Furnace



W. M. BUTLER.

FUR'NACE. APPLicATIoN FILED SEPT. 25. 1917.

INVENoR.

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FURNACE.

APPLICATION FILED SEPT|251 97.

Patented Apr. 13, 1920.

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INVENTO .BY Mm.

ATTORNEYS.

WILLIAM MARSH BUTLER, 0F SYRACUSE, NEW YORK.

FURNAGE.

Specification of Letters Patent.

Patented Apr. 13, 1920.

Application led September 25, 1917. Serial No. 193,184.

To all whom t may concern:

Be it known that I, WILLIAM MARSH BUTLER, `a citizen of the United States, and a resident of Syracuse, in the county y of Onondaga and State of New York, have invented a certain new and useful Furnace, of which the following is a specification.

This invention has for its object a sectional furnace which is particularly simple in construction and highly efficient and durable in use; and the invention consists in the features and in the combinations and constructions hereinafter set forth and claimed.

In describingr this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a vertical sectional view through a heater constructed in accordance with my invention.

Fig. 2 is a transverse sectional view on line 2 2, Fig. 1. Y

Fig. 3 is a fragmentary front elevation of my heater.

Fig. 4; is a plan view of the plate at the lower end of each section.

This furnace comprises, generally, a fuel and re pot or chamber, a combustion chamber, upwardly extending air conduits separating said chambers, fire passages connecting the chambers, the conduits having air inlets at their lower ends and'hot air outlets at their upper ends, a casing, a receiver common to the conduits and having connections to the rooms to be heated, and a hollow front wall open at its ends and communicating with the casing.

Preferably, the furnace is provided with front and rear conduits, which inclose the combustion chamber, the conduits converging and uniting at their' upper ends and also converging slightly toward their lower ends and inclosing the combustion cha-mber, the re passages connecting the fire chamber and the combustion chamber extending between the front air conduits.

This furnace also comprises sections, each of which is formed with a front and rear air conduit, open only at their upper and lower ends and closed on all sides, the combustion chamber inclosed by the conduits and open at its sides into the combustion chamber, and an outer combustion chamber communicating with the inner combustion chamber by passages extending between` the sections.

The sections are mounted on a. base common to all the sections and are partly inclosed by a casing or hot air receiver.

1 designates the base which is here shown as formed with an air box 2 having an intake 3. L are the upright sections, usually castings which are bolted together by bolts 5 passing through lugs 6 on the sections. lEach section lis formed with an inner combustion chamber 7 and outer chamber 8, front and rear upright air conduits 9, 10 between the chambers 7 and S, and also passages 11 connecting the chambers 7, 8. The combustion chambers are open at their sides and thev passages 11 are formed in the opposing sides of the sections.

The air conduits 9, 10 converge and unite at their upper ends in an outlet passage 11Z1 which opens into the casing or receiver 12, `and said passages 9, 10 also converge slightly toward their lower ends and open at their lower ends into the air box 2. The air conduits 9, 10 are in the form of an inverted U or a horseshoe, and the lower ends of branches converge inwardly. The lower portions of the front air conduits have their front sides exposed in the fire and fuel chamber of the furnace and are formed with passages 18 connecting the fire chamber and the inner combustion chamber 7. The combustion chamber 7 is closed atvits lower end by a plate 14, one for each section, the platehaving openings 15 which register with the open lower ends of the conduits 9` 10. Said plates 1i rest on the base 1. The outer combustion chamber 8 overlies the top of the front air and rear air conduits 9 and 10 and extend downwardly along the back of the rear conduits 10, and is provided with a chimney connection 16 at its lower end.

The casing 12 inclosing the sections 4, and into which the conduits 9, 10 of the sections open, has hot air pipe connections 17 which lead to the rooms to be heated.

18 designates the fuel and fire box or chamber, and in this form of my invention, each section i is provided on the upper portion thereof with upright plate 19 extending upwardly from the foremost portions of the air conduit 9 and above the upper wall of the chamber 8, the plate 19 forming the rear wall of the upper portion of the magazine or fuel chamber. The plate 19 may be integral with the sections but is usually separable therefrom and is attached thereto in any suitable manner as by screw bolts. The to outer walls 8a, 8b of the combustion cham er 8 are also separable pieces which are secured in position to the plate 19 and to the body of the section in and to each other in any suitable manner.

20 is the front wall of the fuel chamber, said wall being hollow and mounted upon the front portion 21 of the base. Said wall has transverse air passages 22 therethrough, one or more for each section. The front wall 20 is open at its ends and communicates with the interior of the casing or receiver 12. The front wall 20 is preferably formed in different widths for different widths of furnaces, and the air conduits thereof are in communication with each other. Said front wall rests on the base 1 and is secured at its edges to the casing. v

23 is the grate supported in the base 1 at the lower end of the fuel chamber.

In operation, the fire is built on the grate 23 and the fuel filled into the chamber 18. The products of combustion pass from the fire chamber 18 between the units through the passages 13 and into the combustion chamber 7, thence upwardly into the outer combustion chamber 8 through the passages 11, and through the' chamber 8 downwardly along the outside of the air conduits 10 to the chimney.

The air supporting combustion passes in under the grate 23 and also above the grate through the air passages 22 in the hollow front wall 20. The air, as it is heated, rises from the air box through the air conduit 9, 10 and passes into the casing 12. The heated air is conducted from the casing to the rooms being heated.

This furnace is particularly advantageous in that it provides a hot air heater which can be built economically in sections so that the heater can be readily adapted to the size of the building it is desired to heat.

What I claim is:

1. A furnace comprising a re and fuel chamber, a combustion chamber, front and rear upwardly extending air conduits, the front conduits being interposed between the combustion chamber and the iire and fuel chamber and having spaced apart portions forming passages connecting said chambers, a second combustion chamber at the rear of the rear conduits, each front and rear conduit uniting at their upper ends and having a common outlet, 'a combustion chamber extending on the top of the air conduits above the passages connecting the iire chamber and the combustion chamber, and on the rear of the rear air conduits, and passages connecting the combustion chambers near the top ofthe inner combustion chamber, substantially as and for the purpose described. ,Y

2. A furnace comprising sections having upwardly extending air conduits, a combustion chamber in the rear of the air conducts, a fuel chamber in front of the air conduits, the sections being arranged side by side and the combustion chamber of each section being open at its sides and alined with the combustion chamber of the next section, the lower end portions ofthe air conduits forming the rear wall of the fuel chamber and being spaced apart forming horizontally extending passages connecting the fuel chamber and the combustion chamber, the upper portions of the air conduits above the passages lying against each other, substantially as and for the purpose described..

3. A furnace comprising sections having front and rear upwardly extending air conduits, and a combustion chamber between the front and the rear air conduits, the sections being arranged side by Vside and the combustion chamber of each section being open at its sides and alined with the chamber of the next section, the front air conduits havingtheir lower end portions arranged to form the rear wall of the fuel chamber and being spaced apart to form horizontal passages connectingY the fuel chamber and the combustion chamber, and the fuel chamber located in front of the lower end portions of the front air conduits and in front of the front ends of said passages, the portions of the front air conduits above said passages lying against each other, substantially as and for the purpose specified.

4. In a furnace the combinationof upwardly extending air conduits, a combustion chamber in the rear of the air conduits, a fuel chamber in front of the air conduits, a grate in the Ycombustion chamber at the lower ends of the air conduits, the air `conduits being formed with 'passages connecting the fuel chamber and the combustion chamber, the lower portionsof the airconduits, which have vthe pas'sages therein, forming the back wall of the fuel chamber, substantially as and for the purpose set forth.

5. A furnace comprising a plurality of upright sections arranged flatwise one against the other, and a fuel chamber in front of the section, each section being formed with central and outer combustion chambers open at their sides into like combustion chambers of the next chamber, front and rear air conduits between the inner and outer combustion chambers, the air conduits being closed at their sides and having openings vin their lower and upper ends for the inlet of cold air and the outlet of heated air, and passages in the sides of each section contiguous to the next sections for connecting the inner and outer combustion chambers and for connecting the fuel chamber with the inner combustion chamber, substantially as and for the purpose described.I

6. A furnace comprising upright sections, each section having air conduits closed at their sides and converging downwardly and inwardly at their lower ends and having connections with the cold air inlet at their lower ends, and also converging and uniting at their upper ends and having a common outlet opening through the top of the section, each section also having a combustion chamber inclosed by the air conduits and open at their sides, outer combustion chambers extending along the rear and top of the air conduits and passages in the sides of the section contiguous to the next section for connecting the inner and outer combustion chambers, substantially as and for the purpose specified.

7. A furnace comprising a base formed with an air box, upright sections mounted on the base side by side and abutting against each other, a hollow wall opposed to the front sides of the sections and forming a fuel and a lire chamber, and a casing inclosing the sections, the front wall being open at its ends and communicating with the casing, each section having inverted U- shaped air conduits closed at their sides and converging inwardly at their lower ends, and opening at their lower ends into the air box, the front air conduit of each section forming the rear wall of the re chamber, the space inclosed by the U-shaped fire passages forming an inner combustion chamber, each section also having an outer combustion chamber open at its sides and extending along the rear sides and the top of the air conduits, the outer chambers having a chimney connection at their lower rear ends, substantially as and for the purpose set forth.

In testimony whereof I have hereunto signed my name, at Syracuse, in the county of Onondaga and State of New York, this 6th day of May, 1917.

WILLIAM MARSH BUTLER. 

